COMPUTER EDUCATION TUTORIAL

Definition of Operating System: 1.      An  operating system  ( OS ) is a software, that manages the computer hardware, and provides common services for execution of various application software.  For hardware functions such as input and output and memory allocation, the operating system acts as an intermediary between application programs and the computer hardware . 2.      An operating system (sometimes abbreviated as "OS") is the program that, after being initially loaded into the computer by a boot program, manages all the other programs in a computer. Objectives of Operating System: 1.      Convenience :  makes computer user friendly. 2.      Efficiency :  allows computer to use resources efficiently. 3.   Ability to evolve :  constructed in a way to permit effective development, testing and introduction of new functions without interfering with service.   Functions of Operating System: 1.      Resource Management

What is CPU? What are the Functions of CPU? The CPU, or Central Processing Unit, is both the heart and brains of every computer. Many of us do not know how important this unit is to the performance of a computer. How many of you have wondered about the basic functions of CPU? This article will answer that question, plus others including: Why it is important to have a good cooling system to keep the CPU at the right temperatures. Why it is so important to keep the CPU from overheating. The Four Primary Functions of the CPU The CPU processes instructions it receives in the process of decoding data. In processing this data, the CPU performs four basic steps: Fetch:  Each instruction is stored in memory and has its own address. The processor takes this address number from the program counter, which is responsible for tracking which instructions the CPU should execute next. Decode:  All programs to be executed are translated to into Assembly instructions. Assembly code must

Shortcut Keys Description Alt+Home Open your homepage. Alt+Left Arrow Back a page. Alt+Right Arrow Forward a page. F11 Display the current website in full-screen mode. Pressing F11 again will exit this mode. Esc Stop loading the page or a download from loading. Ctrl+(- or +) Zoom in or out of a page, "-" will zoom out and "+" will zoom in on the page. Ctrl+1-8 Pressing Ctrl and any number 1 through 8 moves to the corresponding tab in your tab bar. Ctrl+9 Switch to last tab. Ctrl+0 Reset browser zoom to default. Ctrl+Enter This combination is used to quickly complete an address. For example, type "computerhope" in the address bar and press Ctrl+Enter to get https://www.computerhope.com. Ctrl+Shift+Del Open the  Clear browsing data window to quickly clear private data. Ctrl+Shift+B Toggle the bookmarks bar between hidden and shown. Ctrl+A Select everything on a page. Ctrl+D Add a bookmark for the page currently opened. Ctrl+F Open the "